This is a distinct species in northeastern states and Appalachian region (Gil-ad 1997, K, W), but it may intergrade with typical sagittata, especially in the midwest (e.g. D). V. fimbriatula differs from sagittata as follows (Gil-ad 1997; Ballard et al. 2023): outer leaves spreading to prostrate (versus erect); blades oblong to oblong-ovate (versus narrowly lanceolate to lance-oblong), with L/W 1.5-1.8 (versus 2.2-2.8) and the base cordate to subcordate (versus sagittate); petioles mostly shorter than blades (versus distinctly longer when flowering); plants densely hirtellous (versus glabrous or hirtellous). V. fimbriatula typically occurs in somewhat hilly areas (versus mostly flatlands for sagittata), often on more coarse-textured soils and in open woods, along roads or edges (versus full sun). Colls. from the Pine Creek area in BULL (JC for KY) may be transitional to sagittata, with larger plants approaching typical sagittata in leaf shape but remaining less distinctively lobed and relatively pubescent. A coll. of Wharton from LINC (#1771 at EKY) was initially named fimbriatula but is excluded here. It seems generally similar to sororia, but perhaps introgressed with fimbriatula or another species with relatively small blunt leaves.